Transcript Rock Cycle - Cobb Learning

Rock Cycle
You will need your textbook
and notebook paper
Igneous Rocks
You will have 5 minutes to read
pages 98-101
When you are finished, look at the
pictures and read the captions
LAVA
Igneous rocks are formed from ____
or MAGMA
____that
cools and becomes solid.
The 3 Most Important Things about
Classifying Igneous Rocks
1. ORIGIN: Where the igneous rock is
formed.
a. Extrusive is formed from lava on
top of Earth’s surface
b. Intrusive is formed from magma
underneath Earth’s crust
What do the prefixes EX- and IN- mean?
2. TEXTURE: Size, shape, and pattern of
a rock’s grains or crystals
a. Large crystals form from slow cooling
b. Small crystals form from quick cooling
c. Porphyritic means part of the magma
cools slowly and part cools quickly
creating both sizes of crystal
3. MINERAL COMPOSITION: Minerals
that are in a rock
REMEMBER: Minerals are not made from
rocks (they are pure) but rocks can be
made from minerals
Sedimentary Rocks
You will have 5 minutes to read
pages 102-105
When you are finished, look at the
pictures and read the captions
Sedimentary Rocks
SEDIMENT is small, solid pieces
________
rock or living things.
of
Betsiboka River, Madagascar
EROSION
DEPOSITION
Running water or wind loosen and
carry away fragments of rock
Sediment settles
COMPACTION
CEMENTATION
Sediment is pressed together
Dissolved minerals crystallize and
glue sediment together
Create an illustration in each box representing the step of formation
3 Type of Sedimentary Rocks
Clastic: Broken pieces of other
rocks are squeezed together
Organic: Thick layers of plant and
animal remains
Chemical: Minerals are dissolved in a
crystallized solution
Rock Cycle Animation
Rock Cycle Animation
Metamorphic Rocks
You will have 5 minutes to read
pages 106-111
When you are finished, look at the
pictures and read the captions
HEAT
PRESSURE deep beneath Earth’s
__________
and _________
surface can change any rock into a metamorphic
rock
Geologists classify metamorphic rocks by
the arrangement of the grains that make
the rock:
1. Foliated metamorphic rocks will have
grains that are arranged in parallel layers
2. Non-foliated metamorphic rocks will
have grains that are randomly arranged